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Una's Una's A7V VRMAir duct mod
Date Posted: Dec 29 2000
Author: Unaclocker
Posting Type: Article
Category: Air and Heat Pipes
Page: 1 of 1
Article Rank:No Rank Yet
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Note: This is a legacy article, imported from old code. Due to this some items on the page may not function as expected. Links, Colors, and some images may not be set correctly.
Una's A7V VRMAir duct mod By: Unaclocker

Una's Air Duct

By : UnaClocker
Date: 12/29/00

Here's the problem, I've got an Asus A7V, modded to give me more voltage, and I'm watercooling. The mod gives me more voltage, but it stresses the voltage regulators a lot more than a normal CPU would. The watercooling takes away the fan that is normally blowing on the voltage regulators - the CPU fan. So I felt that I should do something to protect the voltage regulators, if not to improve stability, at least to prolong their life. Well, let's see a picture of the situation before I started, with the fan already in place.

Yeah, it's a little blurry, my camera really wasn't meant to take this kind of picture. Anyway. On the left side of this picture you'll see the fan, with a filter on it, and below that (or to the right of it in the picture) you'll see the voltage regulator daughter board. What I needed was a way to direct the air down and over the voltage regulators. I placed a thermistor on the transistors on the VR board, and found one of them at 145f, and many others at 100+. So I found a box made of a suitable poster board like material, and cut it up.

The Problem ( But Dig the Blorbage :)

The incredibly space age material used for this duct

Here's what I came up with, fold the two sides down, and bend the lower part downward, and we end up with a great duct, that looks like the pic below.

Ok, here you see how it works, it ended up with a nice gentle arc to prevent causing too much back pressure, which seriously decreases airflow. I used packing tape to hold it all together, and to hold it onto the case. The best part is, I could take my cardboard "prototype" and use it as a template to make a sheet metal version of this duct, if I were so inclined. 

The results? That same 145f transistor is now at 95f. Granted, this isn't as accurate of a reading as Joe's Temp gun, but the temps are pretty good, I used the same temp probe both times. The fan shown in the first picture is not the one I ended up using, I ended up using the YS Tech fan from my old FOP32 heat sink, I wired the fan into my fan bus, but still ran the rpm wire back to the motherboard so that I could keep track of the speed of the fan.

Also, the hole for the fan, I put that in in Project Little Stealth.

That about wraps this article up,  If you have Questions please post them on the ProCooling Forums (recommended), or Email UnaClocker directly.

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